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10 questions
Which drawing below represents this chemical formula?
Which drawing below represents this chemical formula?
Is this equation balanced?
yes
no
Is this equation balanced?
yes
no
4 molecules of Hydrogen Gas (Hâ‚‚) react with 2 molecules of Oxygen Gas (Oâ‚‚) to make some Water (Hâ‚‚O). How many molecules of water will this reaction make?
1
2
3
4
Which equation below is balanced?
Which of the following statements is TRUE about the equation below?
The equation IS balanced because there are 2 atoms of Nitrogen and 5 atoms of Hydrogen on each side of the equation.
The equation is NOT balanced because there are 6 atoms of Hydrogen in the reactants, but only 3 atoms of Hydrogen in the products.
The equation IS balanced because there are 2 atoms of Nitrogen and 6 atoms of Hydrogen on each side of the equation.
The equation is NOT balanced because there are 5 atoms of Hydrogen in the reactants, but only 3 atoms of Hydrogen in the products.
In chemical reactions, what does the law of conservation of mass mean?
6 CO2 + 6 H2O → C6H12O6 + 6 O2
What are the reactant(s) in this equation?
CO2 and H2O
C6H12O6 and O2
H2O and C6H12O6
CO2 and O2
Zn + 2 HCl → H2 + ZnCl2
If you have 5 atoms of Zn, and 10 molecules of HCl in the reactants, how many atoms of Zn will you have in the products?
5
10
15
50
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